Service difficulty report · Fire Bottle · Boeing 747446

Difficulty date
July 26, 2025
Submitted
July 31, 2025
Operation
Air carrier
Aircraft
N742CK
Make and model
Boeing 747446
Aircraft serial
25574
Aircraft time
124,185 hours, 25,560 cycles
Part
Fire Bottle
Part number
3490000534
Part serial
01200N1
Condition
Unserviceable
Location
Lower Cargo
Stage of operation
LD
How discovered
O
Nature of condition
N
Precautionary procedure
F

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FIRE CARGO FWD MSG. FAK & ALL SRCS MVD TO U/D XFER TO DMI 100259185 IAW MEL 26-23-1-2 CAT C DUE 08-06-2025 MX PROC C/W PLCDS INSTL. REF DMI 100259185 FOR DEACT FWD LWR LOBE SMOKE DET SYS. SYS DEACT, XFER TO DMI 100259186 IAW MEL 26-16-1-2-2B CAT C, MX PROC C/W. PLCDS INSTL. REF DMI #100259185 FIRE CARGO FWD–MOVED FAK ITEMS ONTO M/D. IAW WO 742049403 & DMI 100259185. RET FAK INTO ORIG POS, CLRS DMI 100259185 PLCDS REM. REF DMI 100259186– FWD LWR LOBE SMOKE DETECT DEACT FOR FIRE BOTTLES. REACT FWD LWR LOBE SMOKE DET SYS IAW AMM 26-16-01. CLRS DMI 100259186, PLCDS REM REF WO 742049404. ACCOMP DROP IN WP 742CK/L-280725. ACCOMP W/P 742CK/L-280725 DURING DROP IN 742049410,411,412,413,414,416. LWR CARGO FIRE BOTTLES REQ RPLCMNT. REM AND REP LWR CARGO FIRE BOTTLE F,E,D,C,B,A IAW AMM 26-23-01.OPS CHKS GOOD IAW AMM 26-23-01.